Creating and refining a sequence is the core of the editing process. Once you've made decisions about edit selection and placement, you can start to focus on other aspects, such as adding transition effects to finesse the sequence. Transitions are very versatile. They can be used to smooth an abrupt edit or to create a sense of time passing. They can also simply add variety to your video by changing how you get from one clip to the next. In this lesson, you will explore different ways to apply a variety of transition effects to the audio and video clips in your sequence.